Trump attorney's photo with Tom Arnold fuels tape speculation

President Donald Trump's former longtime personal attorney Michael Cohen retweeted a photo of himself with comedian Tom Arnold, who is working on a TV show to hunt down recordings of the president, fuelling speculation that Cohen has secret tapes of Trump and is willing to share them.

Last month, Vice Media announced that Arnold would be featured in a new show called "The Hunt for the Trump Tapes" and would investigate rumoured recordings of the president.

The idea for the show, which is set to air on Viceland later this year, came about after the release of the "Access Hollywood" tape during the 2016 presidential election, which captured Trump bragging about grabbing women's genitals.

In announcing the show last month, Vice said Arnold would "draw on his high-profile network of celebrity friends, entertainment executives, and crew members he's met over more than 35 years in showbiz to dig for evidence on Trump's most incriminating moments."

Arnold tweeted Friday to clarify that it was him who said he was teaming with Cohen to "take down" Trump and that Cohen was not being paid by Vice. Cohen replied, "Thank you Tom for correcting the record."

For more than a decade, Cohen was Trump's personal lawyer and fixer, and he has long been a key power player in the Trump Organisation and a fixture in Trump's political life.

He regularly threatened lawsuits against those who could pose a challenge to Trump, and a day before the FBI raided his office and hotel room, he tweeted, "I will always protect my POTUS."

Last week, Trump said he hadn't spoken with Cohen "in a long time" and said, "He's not my lawyer anymore, but I always liked Michael."

Cohen's attorney, Guy Petrillo, did not immediately respond to an email seeking comment.

A publicist for Arnold referred an inquiry from The Associated Press to a Vice Media spokesman, who didn't immediately comment.

Donald Trump's personal lawyer Michael Cohen. (AAP) (AAP)

Cohen is under investigation by federal officials in New York.

His home, office and hotel room were raided by the FBI in April as part of a probe into his business dealings.

Investigators are also looking into a $130,000 payment made as part of a confidentiality agreement with porn actress Stormy Daniels, who alleges she had an affair with Trump in 2006, which Trump denies.

She is suing both Cohen and Trump in an attempt to invalidate the nondisclosure agreement.

Daniels' former attorney, Keith Davidson, has sued Cohen and alleges he illegally recorded their telephone calls when Davidson represented Daniels.

The lawsuit, filed earlier this month in Los Angeles, provided no proof to substantiate the claims and no details on exactly when the calls were recorded.